摘要
采用1,3-二醚为内给电子体的Z-N催化剂制备了超高熔体流动性聚丙烯,对其催化剂的聚合性能以及聚合物的性能进行了分析,重点通过GPC、流变、13 C-NMR等手段表征了聚合物的结构特征。二醚催化剂具有较高的聚合活性和极高的氢调敏感性,产品分子量分布、立构规整度、结晶度中等,拉伸强度、断裂伸长率和冲击强度较低,但弯曲强度和弯曲模量并不降低。具备进一步开发直接聚合法熔喷纤维料的基础。
Ultra high melt flow rate（UHMFR）polypropylene was obtained by Ziegler-Natta catalyst which used 1, 3-diether as internal donor. Structures and performances of this UHMFR polypropylene were extensively studied by GPC, DSC, C-NMR and theology. The investigation showed that the catalyst which used 1,3-diether as internal donor had reia- tively high activities and very good hydrogen response. UHMFR polypropylene displayed moderate molecular weight distri- bution, tacticity and crystallization. The tensile strength, elongation at break and impact strength were relatively low. How- ever the {lexural properties such as flexural strength and {lexural modulus were relatively high. Therefore, this UHMF pol- ypropylene was desirable to be investigated further for usage in the melt-blow fiber.
出处
《化工新型材料》
CAS
CSCD
北大核心
2013年第6期137-139,共3页
New Chemical Materials
关键词
二醚
聚丙烯
熔体流动速率
熔喷纤维
diether, polypropylene, melt flow rate, melt-blow fiber
